I usually agree with both of you guys, however this time I'm going to disagree. A bilge pump has saved my a$$ on more than one occasion. Once, I made a rookie mistake and left the drain plug out, and the other time my mechanic (me) apparently didn't get the hose from the pump to the block on tight enough it popped off and filled the hull, if it had not been for the bilge pump we would have been in deep doo doo.
I know both incidents were my fault but sometimes we can't account for human error. Yes you may never need a bilge pump, but $50.00 is pretty cheap insurance.
Lou